what if you were to add more resorces and make it so if you take basic resorces iron/coal, coal/cobble take and make a 2X2 checker set and make a new resorce and have the new resorces be able to mix up until you get the max resorce that can make tools that wont break. mind you have like 6 or seven tiers of materials that way you cant just have best right off bat.

idea is just off top of head if anyone has any way of making it beter by all means plz say so.